Quote:
SteveCallas wrote:
 Lastly, I'll never be a fan of the concept of reducing port area to achieve a lower tune - that's about as backwards as you can get. The low end numbers look nice in the lower tuning modes, but the onset of audible chuffing becomes that much more of a reality. |
Steve, the port limitations don't seem to be a problem at the 15hz tune. You'll notice that there is very little loss of efficiency in this tune compared with the 20 hz tune. I haven't seen any port chuffing in either 20 or 15hz tuning. As for the 10hz mode, I doubt a single 3.5" port could be sufficient. There is a marked loss of efficiency in this mode and I'm sure it's underported here. Chuffing here could be a problem, but it should only show up with very low frequencies.